Subtract 16/21 from 40/20
1st number: 2 0/20, 2nd number: 16/21
40/20 - 16/21 is 26/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
40/20 = 40 × 21/20 × 21 = 840/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
16/21 = 16 × 20/21 × 20 = 320/420 - Subtract the two like fractions:
840/420 - 320/420 = 840 - 320/420 = 520/420 - After reducing the fraction, the answer is 26/21
- In mixed form: 15/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/20-16/21 40/20-32/21 40/20-16/42 40/20-48/21 40/60-16/21 40/20-16/63 40/20-80/21